INSTALLATION / OPERATION / MAINTENANCE
MODEL
351GF-15
Hydrant Coupler
351GF-15 Hydrant Coupler
This installation/operation/maintenance guide is designed to
provide instructions for the installation operation & maintenance/service for the Poppet Actuating Section of the Model
351GF-15 Fueling .
The hose end of the elbow is fitted with a QUICK DISCONNECT
which swivels about its centerline and can be removed from the
elbow while connected to the hose.
The lower element of the coupler assembly FIG.1 is a DRY
DISCONNECT hand operated unit with an interlock (A), which is
activated by placement on an API hydrant.
OPEN
CLA-VAL
Ground Fueling
Fig. 1
DESCRIPTION:
3" or 4" Hose Disconnect
A
CLA
-V
C
B
AL
F
4” Coupler here
The Model 351GF-15 Hydrant coupler is a 4" size designed to
mate with hydrants manufactured in accordance with A.P.I.
Bulletin 1584. There are three basic assemblies to make a
complete connection from hydrant to hose. These are the coupler shown above the ELBOW with nuts and bearing race in 4"
hydrant to 3" hose size or 4"x 4" hose.
E
The 28291-01B LOCKPIN (A) has an annular notch into which
the steel ball (B) can withdraw.
The steel ball (B) locks the 28278-01J sleeve (C) in the up or
"Poppet Closed" position which, in turn, prevents the operating
handle (D) from rotation which would open the coupler poppet (F).
As previously stated, when the "Lockpin" (A) is depressed, the
ball (B) can disengage the sleeve (C) permitting it to be pushed down.
The downward travel of the sleeve (C) drives the 12 steel balls (E)
under the lip of the API hydrant locking the device on the hydrant.
INSTALLATION & OPERATION
The 4" hydrant to 3" hose or 4" hydrant to 4" hose quick disconnect
is available on its appropriate elbow as an option with 3" NPT or
4" NPT thread sizes for hose connection.
The assembled unit is shipped with the quick disconnect &
elbow as specified for connection to the hose and placement on
the hydrant.
1
351GF-15
The disconnect can be attached
to the hose while assembled
4-6 4-7
5
4-8
because it swivels but the 0-Ring
seal causes a lot of drag.
If the disconnect assembly is to
be removed from the elbow coupler assembly for easy attachment to a hose, a 5/32" (4 mm)
8 NPT
Allen wrench is required to
remove the two 10-32 Socket
Head screws retaining the
28296-01B
Lock
(4")
or
200073¬01H Lock (3") allowing
the Spring retaining 4-7 ring to be
expanded out of its groove and
moved back to the groove at the
4-3 4-4
4-5
threaded end of the assembly.
Having moved the Spring
Retaining Ring, the Sleeve Adapter can be moved back which
allows the steel balls to disengage the elbow and be removed.
To reinstall the assembly on its elbow reverse procedure.
With the hose connected to the disconnect assembly and reinstalled on the elbow, the coupling assembly can be placed on a
4" API Hydrant conforming to Bulletin API 1584 (2nd Edition 121994).
CROSS SECTION OF HYDRANT:
G
counter clockwise direction. Forces involved when the operation
handle is moved are several starting with the first 15º of travel
because the 200277-01B Wave Spring (find no. 1-7 dwg. 29725)
is compressed until the 28289-01F crank (find no. 1-19 dwg.
29725) passes top dead center, then the spring expands driving
the 28276-01C Seat assembly down, keeping it in contact with
the coupler poppet assembly 28281. Next in sequence, the coupler poppet con¬tacts the “Pressure Equalizing Valve” (F) or
poppet on center of the API 1584 hydrant and as travel progresses, the P.E.V. is depressed equalizing pressure between
hydrant and coupler.
The dimensional relationship between coupler components and
hydrant provides coupler seat assembly driven by wave spring
to make hydrant contact at the time the coupler poppet has
opened to provide a fluid path for the hydrant pressure equalizing Valve (F) opening, then as the coupler poppet contacts the
hydrant poppet (G), the force required to compress the hydrant
poppet drive spring (H) is evident.
Full stroke of the coupler operating handle positions is approximately 15º below the horizontal top line of the 28278-01J sleeve
(C) (Handle travel from closed to full open is 210º). At the full
stroke position, both coupler poppet and hydrant pop¬pet are full
open (2” of travel) for max. flow.
Stop flow and removing coupler from hydrant. Move the coupler
operating handle from the open position in clockwise direction.
WARNING
Because of stored energy in the hydrant poppet drive, spring (H)
and fluid pressure under the hydrant poppet, the coupler operating handle can “FLIP” with considerable force when the
28289-01F CRANK (find no. 1-19 dwg. 29725) moves from its
15º past vertical locked position to the 6 o’clock position (straight
down) and the poppet link and crank are free to be driven by a
force under the hydrant poppet.
F
H
Operator should provide a restraining force followed by a push
of 28286-01B handle clockwise to close the coupler poppet and
lock it in its closed position.
With the coupler poppet closed and locked (by 15º past top dead
center of crank), the Sleeve (C) can be lifted releasing the 12
steel balls from the hydrant allowing the coupler to be removed.
Replace the 29762-01A Cover Assembly (find no.3 dwg. 29725).
Placement of the hose, disconnect, elbow and coupler on the
hydrant displaces the lockpin (A) (Fig 1, page 1) permitting the
ball (B) to release the sleeve (C) locking the assembly on the
hydrant.
SPECIFICS OF OPERATION.
Rotation of the coupler handle counter clockwise (away from the
hose) approximately 15º will bring the cam portion of the handle
into contact with the sleeve (C) locking it in the down position for
the remainder of any travel of the operating handle in the
OPEN
MAINTENANCE
Replacement of the 28277-01A Guard (find no. 1-4 dwg. 29725).
The coupler with elbow can be removed from the hose by following the procedure outlined on page 1.
Inspection or replacement of the 28276 Seat Assembly, its
00833E O-Ring or the 200277-01B Wave Spring can be accomplished as follows:
WARNING
Assure that the hose is not pressurized and is drained before
separating the quick disconnect from the elbow. With the disconnect and hose removed, the replacement guard can be
passed over the elbow - and down to the 28278-01F Sleeve. If
the 28286-01B Handle is an interference, depressing the 2829101B lockpin and letting the 28278-01F Sleeve drop allows the
handle to rotate to the half travel position for easy pass on the
Nitrile guard. Stretching the guard over the retaining lip of the
sleeve can be difficult and a thick mix of soap in water will help.
Inspection or replacement of the 28276 Seat Assembly, its
00833E O-Ring or the 200277-01B Wave Spring can be accomplished as follows:
2
351GF-15
ponents.
WARNING
Assure that the hose is not pressurized and is drained
Open the poppet by depressing the 28291-01B lockpin, which
allows the 28278-01F sleeve to be moved providing clearance
for rotation of the 28286-01B Handle.
When the elbow is removed, a 5 1/2 or 6" length of hardwood
dowel can be placed on the top edge of the seat seal assembly,
then with hammer or mallet the ring is driven out of the coupler
body. Moving the dowel from side to side cocking or jamming of
Tool required - 0.094 (2.39 mm) Hex (Allen) Wrench. Opening
the poppet by rotating the operating handle releases the energy
of the 200277-01B Wave Spring reducing the torque required to
remove the 6 each 8-32 Socket head. Screws which retain the
28280-01E Poppet. Removing the poppet exposes the 00779K
O-Ring and allows the 28276 Seat Assembly to be removed.
Removing the 28276 seat assembly from the coupler body can
be difficult because the O-Ring (01140A) must be tight to seal
and the "low swell" compound only means it does not swell as
the ring can be prevented. After inspection and/or replacement
of Seat Assembly, Wave spring and O-Ring the items can be
reinstalled by placement in position-reinstalling the 28280-01E
poppet. Then rotating the operating handle to the coupler
"closed" position.
NOTE:
The 00833E O-Ring on the seat assembly is a "low swell" compound Parker No. N497-70 or equal for longer service life in
Fuel.
Additional inspection and maintenance or disassembly and
reassembly should be confined to a shop environment.
Access to interior components of the "Hydrant Coupler" requires
removing the elbow with or without its disconnect assembly.
Tool required to remove elbow from coupler assembly 1/2 inch
box or open end wrench.
8-32
Remove 6 each 80638-02G (5/16-18) self-lock nuts.
much in fuel. In addition, the poppet stem restricts the space
available for entrance of fingers or tools.
Remove the 29640-01J elbow - exercise care in removing the
00794J O-Ring as it is captured in a protected location and
maybe used in reassembly.
A seat extractor tool is available which can be placed into the
space between the poppet stem and seat seal ring, then
expands outward to engage the ring making it possible to
remove the seat seal assembly with the operating handle. To
remove the seat seal without the extractor tool, the elbow must
be removed which involves removing six nuts that join the com-
When the elbow assembly is removed with or without the
pop¬pet seat assembly, and wave spring, a complete visual
inspection can be made of the interior from the down stream
(elbow end) of the coupler assembly including the path of components while operating handle is in motion.
3
351GF-15
Additional disassembly of the coupler assembly (Fig.1 Pg.1) is
discouraged unless necessary.
If complete disassembly is required, remove poppet, seat
assembly and wave spring as outlined on Pg. 3
Tools required:
• 3/8" open end, box end or socket wrench (for removing
operating handle)
• 1/4" open end, box end or socket wrench
(for 8-32 Hex washer head - find no. 1-24 dwg. 29725)
• 1/8" or smaller pin or drift punch
(to prevent rotation 28291-01B lockpin find no. 1-26 dwg. 29725)
If the 28278-01F Sleeve (See page 2) is to be removed from
the 28282-01A Body (find no. 1-28 dwg. 29725), it is recommended that a cut down 14"x14" corrugated box or tray with
sides two to three inches high be used to prevent loss of 1/4
dia. ball (find no. 1-27 dwg. 29725) and the 12 steel balls,
which are retained by the sleeve.
Having removed the poppet and seat assembly, the poppet
stem is placed in the closed position to provide best access to
the Cotter ring, which is removed with pliers so the stepped pin
can be removed.
At this stage of disassembly it is suggested the relationship of
parts be observed as an aid in reassembly. Position the
assembly with operating handle on the right hand side lifting
the poppet stem by the 28283-01J link high enough to rotate
the link to the 9-o’clock position the 28290-01D Pin (find no. 123 dwg. 29725) can be pushed out. Removing the Pin-Poppet
Stem is aided by a support under the poppet stem and use of
a push rod with 90° short leg, similar to an Allen wrench.
Note:
The poppet stem support method is helpful, almost essential
for reassembly when the poppet stem link attachment pin hole
elevation and orientation must be exact when holding the link
with one hand and reinstalling the 28290-01D Pin.
To remove the crank - required if the 28278-01F sleeve is to
be disassembled.
Remove the 1/4 - 20 Machine Screw holding the 28284-01A
retainer and handle in place on the end of the 28289-01F
Crank
The crank need not be completely removed if the disassembly
purpose is removal of the 28278-01F Sleeve. The crank can
be moved inboard enough to clear the sleeve protecting the
00718H O-Ring and 200293C Backup Ring.
If the 28278-01F Sleeve is to be removed, the item should be
placed in the recommended 14x14 box or tray to contain balls
as they fall from the body.
In the event of complete disassembly, note the position of
washers O-Ring, Backup Ring on the 28289-01F crank as
they are removed.
The 28291-01B Lockpin has not been covered in this disassembly sequence as it can be removed at any time by preventing rotation with a 1/8" dia. or smaller drift punch and
removing the hex washer head 8-32 screw at its other end.
CAUTION:
If the lockpin is removed with the 28278-01F Sleeve in place,
the 200279-01K Spring will eject with the lockpin and the
90290-05K (0.250 dia.) Ball can fall into the pin gallery.
Reassembly of the lockpin with the 28278-01F Sleeve in place
4
351GF-15
will be difficult because the sleeve must be in position to permit the ball to recede by gravity out of the path of the reinserted lockpin with its spring this after getting the ball to enter its
hole from the lockpin gallery.
Note a light coat of grease on the shaft of the crank will aid the
placement of the 00718H O-Ring and back-up ring.
The sequence of reassembly can vary at this point.
Reassembly of Model 351GF-15
It is suggested that the following list of new unused O-Rings
should be on hand for reassembly
2
1
1
1
each 00794J
only 00779K
only 00718H
only 200293C Back-up Ring
Materials and tools required
Loctite – Thread locker 222-Service Removable
Grease – To retain Steel balls in sockets and lube O-Rings to
ease installation.
0.250 Hex (Allen) wrench
1/4" Box or open end wrench
3/8" Box or open end or socket wrench
1/4" Box or open end or socket wrench
.045 thick blade screw driver
.094" Hex (Allen) wrench
1/8" or smaller pin or drift punch
Combination slip joint pliers (to hold 28290-01D Pin-link to poppet
stem for installation)
Pedestal (right circle cylinder) or 3"x 3" block both 3" or more
high 14"x14" cut-down box.
One of the 0079J O-Rings can be saved for back-up replacement
on the 28276 Seat Assembly providing the suggestion on pg 4.
about exercising care when removing the 00794J O-Ring has
been followed.
If the 28291-01B Lockpin has been removed it with the 200279-01K
Spring should be reinstalled and retained with the 200275-01D
Screw.
A - The crank installation can be completed by placing the
O-Ring and back--up ring followed by the 28287-01K Delrin
bearing, then the handle and its retainer with a drop of Loctite
on the bolt.
B - The 28279-01G Stem Poppet (less the 28280-01E poppet)
can be inserted in the body to a full-up position.
Assembly Aid:
Resting the poppet stem on a cylindrical pedestal of 3 or more
inches high and approximately 3" diameter (an inverted tin
can) will facilitate the next steps of the assembly sequence.
With the assembly resting on the pedestal, rotate the body
while restraining the poppet stem (use the 28283-01J link in
the slot of the poppet stem) to a position such that the slots in
the body are 90º relative to the slots in the poppet.
In position as described above, the 5/16" hole in the poppet
stem will be aligned with the slots in the body allowing the
28290-01D Pin to be inserted through the poppet stem and
28283-01J Link. (See Fig 8.) With the link retained in the stem,
the two components can be rotated in the direction of 12
o’clock where the pin will be captured in stem guide area of
the body. With the 200873 Stepped Pin in hand, the link and
crank are aligned by turning and twisting to permit the pin to
be inserted. When the 200873 Pin is in position, the 200874
Spacer is placed on the pin and retained with a Cotter pin.
If option "A" has not been chosen, the O-Ring backup ring
Loctite Thread locker 222 Service Removable or equal on the
200275-01D 8- 32 Screw is recommended.
Reinstallation of the Steel Ball 90290-05K for the lockpin and
the 12 each 90290-06F Steel Balls is facilitated by the use of
a dab of grease in the cavity for each ball to retain them when
installing the 28278-01F Sleeve or length of duct tape.
To install the 28282-01A body with lockpin assembly and Steel
balls into the 28278-01F Sleeve, the sleeve can be inverted on
a smooth bench surface and inside the 14x14 box then the
body carefully inverted and lowered into the sleeve. The
28278-01F Sleeve is carefully lifted and the 28291-01B
Lockpin depressed to provide a indentation recess for the
90290-05K Ball allowing the sleeve to be pulled up capturing
the 12 Steel balls in their sockets, then release the lockpin driving the 90290-05K Ball to engage the annular detent groove
in the inside diameter of the sleeve. Return the body/sleeve
assembly to the upright position. Install 28289-01F Crank with
the 71988-40G washer into the body.
5
351GF-15
bag until reattachment to hose.
bearing, handle with key are installed now.
When the 200873 Pin is in position, the 200874 Spacer is
placed on the pin and retained with a Cotter pin.
If option "A" has not been chosen, the O-Ring backup ring bearing,
handle with key are installed now.
The 28276-01C Seat Assembly with O-Ring can now be
inserted in place and the poppet stem actuated to the full open
position. The 28280-01E Poppet with 0079K O-Ring is
installed on the poppet stem with six 200276-01C (8-32 Skt.
HEAD. C-Sink Screws). With the poppet installed, the seat
assembly can be pulled into position by moving the 28286-01B
Handle from its open to the closed position.
The coupler now reassembled is ready for reuse or
replace¬ment of the 00794 O-Ring and reinstallation of the
29640-01J 4" elbow or the 200076-01E 4" coupler to 3" hose
elbow. The 29764-01B Clip is common with one of the six
5/16-18 nuts that attach the elbow to the coupler. This clip and
its cable are the attachment means of the 29762 Dust Cover
Assembly.
Flushing of the completely assembled device is at the discretion of service personnel. The grease used are locations outside of the fluid flow path, except that used to lube O-Ring on
the seat seal.
Functional Test:
Place complete coupler assembly with elbow and disconnect
on a dry hydrant assembly and cycle through
1-Placement,
2-Depressing of the "Lock Pin" which interlocks the Sleeve,
3-Press sleeve to full down and lock position.
4-Rotate handle through open/close cycle
5-Retract sleeve and remove coupling from hydrant.
Repeat steps 1 through 5 a number of times to insure proper
function of all features of the device.
Pressure test assembled device to insure all seals are in place
and functioning.
After a final inspection install the 29762 Dust Cover Assembly
in the hydrant end and seal the hose end with a plastic plug or
6
351GF-15
Exploded View:
*
*Folding Handle Option Pictured, Exclusively for 353GF. Rigid Styles Only Available on 351GF-15.
7
351GF-15
Parts List:
ITEM
QTY.
PART NO.
DESCRIPTION
MATERIAL
1
1
28277-01A
GUARD
RUBBER
2
1
28278-01F
SLEEVE
ALUMINUM
3
1
28283-01J
LINK
STAINLESS STEEL
4
1
200873-01G
PIN
STAINLESS STEEL
5
6
42878-02F
STUD
STAINLESS STEEL
6
1
200275-01D
SCREW
STAINLESS STEEL
7
1
90290-07D
BALL
STAINLESS STEEL
8
1
28282-01A
BODY
ALUMINUM
9
12
90290-06F
BALL
STAINLESS STEEL
10
1
84081-43K
RETAINING RING
STAINLESS STEEL
11
1
200279-01K
SPRING
STAINLESS STEEL
12
1
28291-01B
LOCK PIN
STAINLESS STEEL
13
1
28289-01F
CRANK
STAINLESS STEEL
14
1
71988-40G
WASHER
STAINLESS STEEL
15
1
200874-01J
SPACER
ALUMINUM
16
1
67992-12D
COTTER PIN
STAINLESS STEEL
17
1
00518B
O-RING
NITRILE
18
1
200293C
BACKUP RING
NITRILE
19
1
28287-01K
BEARING
TEFLON
*20
1
203750-01B
HANDLE
ALUMINUM
21
1
28284-01G
RETAINER
STAINLESS STEEL
22
1
67584-05C
LOCK WASHER
STAINLESS STEEL
23
1
67603-05A
HEX HEAD BOLT
STAINLESS STEEL
* 24
1
205595-01F
FOLDING HANDLE
STAINLESS STEEL
*25
1
90292-17J
TORSION SPRING
STAINLESS STEEL
*26
1
203749-01F
PIVOT SCREW
STAINLESS STEEL
27
1
28290-01D
POPPET STEM PIN
STAINLESS STEEL
28
1
28279-01G
STEM, POPPET
ALUMINUM
29
1
200277-01B
WAVE WASHER
STAINLESS STEEL
30
1
01140A
O-RING
NITRILE
31
1
28276-01C
NOSE SEAL
ALUM. & POLYURETHANE
32
1
00779K
O-RING
NITRILE
33
1
28280-01E
POPPET
ALUMINUM
34
6
200276-01C
FLAT HEAD SCREW
STAINLESS STEEL
*Parts are replaced by ______, ______for rigid handle styles
CLA-VAL
8
P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: 949-722-4800 • Fax: 949-548-5441 • E-mail: claval@cla-val.com • Website cla-val.com
© Copyright
Cla-Val 2010 Printed in USA Specifications subject to change without notice.
N-351GF-15 (R-7/2010)